body {background: #eee;}

.bildpos{
	display: block;
    margin-block-start: 1em;
    margin-block-end: 1em;
    margin-inline-start: 40px;
    margin-inline-end: 40px;
}

.nagglen {
    animation: nagglen ease-in-out 1s infinite alternate;
    transform-origin: center -20px;
    float:left;
    box-shadow: 5px 5px 10px rgba(0,0,0,0.5);
}
.nagglen img {
    border: 5px solid #f8f8f8;
    display: block;
} 
@keyframes nagglen {
    0% { transform: rotate(3deg); }
    100% { transform: rotate(-3deg); }
}